When a plugin INFO file is malformed or missing elements, plugin_load_info_file() should fill missing elements with defaults

[interduo]

Describe the bug
There is an empty plugin list.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'pluginlist'
2. Click on 'log tab'

2019/03/13 10:13:01 - ERROR PHP NOTICE: Undefined index: requires in file: /var/www/html/cacti/plugins.php on line: 266
--
2019/03/13 10:13:01 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[265]:CactiErrorHandler())

[netniV]

Check each of the folders immediately beneath the plugins directory, do they have an INFO file in each? Does that file have a requires = line?

[interduo]

This situation occurs only 3 times and then disappeared.
I will take another survey about that tommorow to see if it occurs more that today.

[netniV]

This is now in the main development code, please check and close if issue is resolved.

[interduo]

It didn't happen more than few times. I did update and It didn't happen again also so I close issue.
Thanks for code cleanup.

[interduo]

2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[234]:CactiErrorHandler())
--
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 234
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[192]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 192
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[234]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 234
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[192]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 192
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[234]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 234
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[192]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 192
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[227]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 227
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[192]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 192
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[234]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 234
2019/03/13 14:30:32 - CMDPHP PHP ERROR NOTICE Backtrace: (/plugins.php[135]:update_show_current(), /plugins.php[323]:plugins_load_temp_table(), /plugins.php[192]:CactiErrorHandler())
2019/03/13 14:30:32 - ERROR PHP NOTICE: Undefined index: name in file: /var/www/html/cacti/plugins.php on line: 192

The code cleanup caused an error& notices in php

[netniV]

This has now been committed to the development code.